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Add the nix-store --serve command

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This is essentially the substituter API operating on the local store,
which will be used by the ssh substituter. It runs in a loop rather than
just taking one command so that in the future nix will be able to keep
one connection open for multiple instances of the substituter.

Signed-off-by: Shea Levy <shea@shealevy.com>
This commit is contained in:
Shea Levy 2014-02-06 11:52:03 -05:00
parent 84a8b5e9af
commit 3a38d0f356
3 changed files with 55 additions and 0 deletions
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31
src/libstore/store-api.cc
View file

@ -258,6 +258,37 @@ string StoreAPI::makeValidityRegistration(const PathSet & paths,
}
void StoreAPI::serve(Source & in, Sink & out, bool sign)
{
for (string cmd = readString(in); !cmd.empty(); cmd = readString(in)) {
if (cmd == "query") {
for (cmd = readString(in); !cmd.empty(); cmd = readString(in)) {
PathSet paths = readStrings<PathSet>(in);
if (cmd == "have") {
writeStrings(queryValidPaths(paths), out);
} else if (cmd == "info") {
// !!! Maybe we want a queryPathInfos?
foreach (PathSet::iterator, i, paths) {
ValidPathInfo info = queryPathInfo(*i);
writeString(info.path, out);
writeString(info.deriver, out);
writeStrings(info.references, out);
// !!! Maybe we want compression?
writeLongLong(info.narSize, out); // downloadSize
writeLongLong(info.narSize, out);
}
writeString("", out);
} else
throw Error(format("Unknown serve query `%1%'") % cmd);
}
} else if (cmd == "substitute")
exportPath(readString(in), sign, out);
else
throw Error(format("Unknown serve command `%1%'") % cmd);
}
}
ValidPathInfo decodeValidPathInfo(std::istream & str, bool hashGiven)
{
ValidPathInfo info;

4
src/libstore/store-api.hh
View file

@ -248,6 +248,10 @@ public:
`nix-store --register-validity'. */
string makeValidityRegistration(const PathSet & paths,
bool showDerivers, bool showHash);
/* Serve the store for ssh substituters by taking commands
* from in and printing results to out */
void serve(Source & in, Sink & out, bool sign);
};